/u/kungfu_kickass's posts in /r/askscience

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If we are told not to scratch, what is the purpose of being itchy?

1596 upvotes

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What would happen if a person stayed underwater continuously without drying off? Like.. for a day, a week, a year, whatever.

947 upvotes

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Why do sunburns feel warm and regular burns feel like any other abrasion?

10 upvotes

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When I get a big blister but don't pop it, after a few days it is dry. Where does the liquid inside go? What is it made of? Where did it come from?

5 upvotes

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When whole cities flood, does this mean the sewers are backing up into the streets or is there some sort of containment mechanism?

3 upvotes

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Do carnivorous predators eat each other?

3 upvotes

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Does cooling affect the shape of an enzyme?

2 upvotes

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If you were hung upside-down long enough would it kill you?

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I've read that roughly 1% of European populations are naturally resistant to HIV. Has anyone ever been known to be naturally resistant to prion diseases?

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If you eat something contaminated with enough harmful pathogens to make you sick, but you do it while drinking high proof alcohol, are you less likely to get food poisoning?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If we are told not to scratch, what is the purpose of being itchy?	1596
What would happen if a person stayed underwater continuously without drying off? Like.. for a day, a week, a year, whatever.	947
Why do sunburns feel warm and regular burns feel like any other abrasion?	10
When I get a big blister but don't pop it, after a few days it is dry. Where does the liquid inside go? What is it made of? Where did it come from?	5
When whole cities flood, does this mean the sewers are backing up into the streets or is there some sort of containment mechanism?	3
Do carnivorous predators eat each other?	3
Does cooling affect the shape of an enzyme?	2
If you were hung upside-down long enough would it kill you?	2
I've read that roughly 1% of European populations are naturally resistant to HIV. Has anyone ever been known to be naturally resistant to prion diseases?	2
If you eat something contaminated with enough harmful pathogens to make you sick, but you do it while drinking high proof alcohol, are you less likely to get food poisoning?	2